Q about the CAP mod for COPS
07-01-2008, 11:48 AM
#7
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Yup. When using a capacitor as a voltage stabilizer for a heavy load at the end of a long cable run, bigger is always better, right up to the point where it blows a fuse at turn-on.
As Y8s pointed out however, electrolytic capacitors have two principle ratings, voltage and capacitance, which for a given physical dimension tend to vary inversely to one another. In other words, a cap rated for 10,000uf at 10 volts and a cap rated for 4,700uf at 20 volts will tend to be about the same size.
So, if your 22,000uf cap is rated at a sufficiently high voltage, then it will be "better" than a 10,000uf cap of the same voltage rating. The guys with the big subwoofers in their car routinely run caps of 1 farad (1,000,000uf) and bigger.
As Y8s pointed out however, electrolytic capacitors have two principle ratings, voltage and capacitance, which for a given physical dimension tend to vary inversely to one another. In other words, a cap rated for 10,000uf at 10 volts and a cap rated for 4,700uf at 20 volts will tend to be about the same size.
So, if your 22,000uf cap is rated at a sufficiently high voltage, then it will be "better" than a 10,000uf cap of the same voltage rating. The guys with the big subwoofers in their car routinely run caps of 1 farad (1,000,000uf) and bigger.
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07-01-2008, 12:01 PM
#8
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Yeah I noticed about the size thing, I opened two powersupplys and each had 2 big capiactiors, but they were around 3000 uf and rated at 200 volts hah. Those capiacitors for subwoofers are huge.
Joe what do you do for a living? You know a good amount about electronics, thanks for all the help.
Joe what do you do for a living? You know a good amount about electronics, thanks for all the help.
Yup. When using a capacitor as a voltage stabilizer for a heavy load at the end of a long cable run, bigger is always better, right up to the point where it blows a fuse at turn-on.
As Y8s pointed out however, electrolytic capacitors have two principle ratings, voltage and capacitance, which for a given physical dimension tend to vary inversely to one another. In other words, a cap rated for 10,000uf at 10 volts and a cap rated for 4,700uf at 20 volts will tend to be about the same size.
So, if your 22,000uf cap is rated at a sufficiently high voltage, then it will be "better" than a 10,000uf cap of the same voltage rating. The guys with the big subwoofers in their car routinely run caps of 1 farad (1,000,000uf) and bigger.
As Y8s pointed out however, electrolytic capacitors have two principle ratings, voltage and capacitance, which for a given physical dimension tend to vary inversely to one another. In other words, a cap rated for 10,000uf at 10 volts and a cap rated for 4,700uf at 20 volts will tend to be about the same size.
So, if your 22,000uf cap is rated at a sufficiently high voltage, then it will be "better" than a 10,000uf cap of the same voltage rating. The guys with the big subwoofers in their car routinely run caps of 1 farad (1,000,000uf) and bigger.
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